US1444909A - Riveting press - Google Patents

Description

Feb. 13, 1923. 1,444,909

J. F.' GAIL RIVETING PRESS Flled Jan. 51, 1919 4 sheets-sheet l jzverzz o v 07272, F

Feb. 13, 1923.

J. F. GAIL RIVETING PRESS 4 'shets-sheet 2 Filed Jan. 51, 1919 fiwenforv kfokn/f RIVETING PRESS Filed Jan. 51, 1919 4 sheets-sheet 5 Inverz/Z oru' Jhn 2'" G22 az,

Patented eb. 13, 1923.

JOHN F. GAIL, OF EVANSTON, ILLINOIS, ASSIGNOR T0 SIMMONS COMPANY, OF KEN'OSHA, WISCONSIN, CORPORATION OF DELAWARE.

aiva'nnc PRESS.

' Application filed January 31, 1919.- Serial No. 274,209.

To all whom it may concern.

Be it known that I JOHN F. GAIL, a citizen of the United States, residing in the city of Evanston, countyof Cook, and State of Illinois, have invented certain new and useful Improvements in Riveting Presses, of which the following is a specification.

My invention relates to improvements in riveting presses and has articular reference to presses in which either mechanical or pneumatic power, or both, may be utilized to effect the heading of the rivet or rivets. 4 i

The principal objects of the invention are, to provide improved mechanism whereby at the same setting of the machine a. plurality of riveting operations may be effected;

, to provide a construction of the class described which will permit the heading of rivets placed with their axis in different planes; to provide a construction whereby apair of' rivets maybe headed either simultaneously or at times separated by a time interval; to provide an arrangement of the class described in which the parts to be secured together by a rivet are securely clamped together prior to and during the riveting operation; to provide an apparatus in which mechanical power may be employed to effect the heading of one rivet, while pneumatic power may be employed to effect the heading of another rivet having its axis disposed differently, relative to the axis of the first rivet; to provide an improved mechanism in which slight inaccuracies in the parts or in the rivets will not affect the setting of the work or the efficiency of the riveting operation; to provide an improved arrangement for rivet- H10 in the same setting of the work, a plurality of rivets having their axes located substantially in the same straight line; to provide an improved arrangement in which the riveting mechanism automatically adjusts itself to the work which is to be operated upon; to provide an apparatus which shall be simple in design and economical to manufacture, while being inexpensive to operate and maintain, and practical and efficient in operation, and in gei'ieral, to provide an economical and efficient apparatus of the character referred to.

In the drawings accompanying this application, I have illustrated as a specific embodiment of my invention a riveting press for heading four rivets in a single piece of work such as a bed spring frame. In said drawings, Fig. 1 is a front elevation of. the

press; 1

Fig. 2 is an end elevation of said press, certain parts being shown in section;

I Fig. 3 is a rear elevation of certain details of the trip mechanism of the press;

Fig. 4 is an enlarged front elevation of a portion of one side of the press;

Fig. 5 is a longitudinal section through one of the pneumatic riveting'heads;

Fig. 6 is a section. taken on the line 6-6 of Fig. 4, and

F ig; 7 is a section taken on the line 7-7 of Fig. 4. I

The articular press illustrated is designed or the purpose of riveting together the two side rails 10 and the end or cross piece 11. of a bed spring frame, all of said parts being of. an leiron construction as shown. The end rail 1H" before it is inserted in the machine is by previous operations furnished with a pair of small angular bracket members 12, said bracket members 12 being secured to one of the sides of said cross angle 11 by-means of suitable rivets 13, or other means, which securingtogether of said brackets 12 and the angle iron 11, having, however, no connections with the operations performed by the particular mechanism now to be described and form-v ing the subject matter of this invention.

Referring particularly to Fig. 4, it will be seen that the side rail or angle 10 is lo- .cated with its bottom flange 14 resting upon the bottom flange 15 of the angle iron 11 and with its outer or vertical flange 16 located outside of and in contact with the vertical side lug 17 of the bracket member 12. Said parts are united by means of my improved press which effects the heading of the vertical rivet 18 and the horizontallv dis osed rivet 19. I

y reference to Fig. .1' it will be see-n that the press is of twin construct-ion comprising a pair of heads, each of which takes care of the riveting of the horizontal and the vertical rivet at one end of the end rail 11 of the bedstead frame. Said riveting heads and associated mechanism are mounted upon a main frame 20 which is supported upon a pair of suitable pedestals 21, preferably cast with and forming an mtegral part. of the main frame 20. Sa d main frame 20 is also formed with a pair of upstanding extensions 22 on which are mounted a pair. of mam power shafts 23. The main power shafts 23 are in this par-" ticular machine wholly individual of each other and are operated in substantiall the same manner as the shaft of an ordinary punch press, that is to say, by' means of suitable trip mechanism controlled by the operator, the each may be caused to make a single revo ution only being driven by the secured to the si e of the upstanding extension frame 22. Intermediate the guides 29 and 30, the plunger is threaded to accommodate an adjusting nut 31, the lower end of which is engaged by a compression spring 32 interposed between the said nut 31 and the guide 30, said compression. swing 32 being effective to raise and maintam the plunger 28 in inoperative or non-tripping condition.

()n the lower extended end of the plunger 28 there is secured a latch block 33 having on its rear face a notch which is engaged by a claw 34 of a latch dog 35 secured to the upper end of a vertical extending trip rod 36; said trip block may be depressed in the usual manner by means of a trip pedal '37 on the end of a horizontal bar 38 pivoted to a floor bracket 39 and pivotally connected at an intermediate point 40 to the lower end of the trip rod 36. 1

The extension spring 41 connected between the pedal bar 38 and a fixed pin 42, serves to elevate the trip pedal 37 automatically when the foot of the operator is removed and a small extension spring 43 serves to hold the latch block 33 and dog 35 in operative engagement with each other, said spring 43 having its ends connected respectively with the latch dog 35 and a small hook 44secured in the rear of a machine frame. X

The shaft 23 is equipped with the usual form of eccentric 45 which by means of a suitable eccentric strap 46 and connecting rod 47 effects vertical movement of the cross messes vertically extending guides 49 and 50 and is connected to the lower end of said eccentric rod 47 by means of a suitable pivot pin 51. In the lower end of the cross head. 48 there is inserted a small hardened wear block 52 which is preferably made removable so that it may be replaced or renewed when wear occurs.

Immediately beneath the wear block 52 there is located a swinging punch block 53, one of the lower corners of which carries a steel riveting block 54, also removable so that it maybe replaced in case of wear. The punch block 53 is carried by the inner end of a curved arm 54, the outer end of which is bifurcated as shown at 55 in order to pivotally engage a. pair of short stout pins 56 secured in opposite sides of the pneumatic hammer body frame 57.

Except during the "actual riveting operation, the punch block 53 occupies the position shown in Fig. 1, the wear-block 52 constituting a stop to limit its vertical movement. During the riveting operation such block 53 is swung down into the position shown in Fig. 4 by means of a control rod 58, the lower end of which, (see Fig. 2) is secured in a bifurcated part 59 which straddles the pedal bar 38. The two arms- 60 of said bifurcated part 59 are slotted as shown at 61 in order to accommodate the opposite projecting ends of a pin 62 horizontallysecured in the pedal bar 38, the purpose of said slot being to permit movement of the punch bloclr53 downwardly when struck by the head 48. After the pedal 37 has been depressed to its fullest extent, the ends of the pin 62 press down against the lower ends of the slot 61 and cause the riveting block 54 to rest upon. the upper end of the rivet 18 (as shown in Fig. 4) thereby limiting the downward movement of the pedal.

When the pedal 37 is depressed, andslightly before its movement is arrested by reason of the riveting block 52 engaging the upper end of the rivet 18, the movement imparted to the trip plunger 28 to the latch mechanism and trip block 36 has been e'fiective to trip the trip pin 26 and thereby connect the shaft 23 with the constantly run-" ning fly wheel 24 whereupon the shaft 23 commences to rotate and the cross head 48, through the medium of the wear block 52 strikes the upper surface of the punch block 53 and heads the upper end of the rivet 18 in an obvious manner (as shown in Fig. 4).

During the downward movement of the cross head, in order to prevent the press from repeating, the latch mechanism which controls the trip plunger 28 is automatically disconnected so that the shaft 25 makes but a single revolutionary movement. This is accomplished by means of a horizontally extending unlatching rod 63 slidably supported by. a pair of suitable guides 64 and 65 at the rear and front of the press frame. The .rear end of said unlatching rod 63 abuts against the flat inner face of the latch dog 35 and the front end of said unlatchin rod 63 is so positioned as to be engaged y the beveled inner surface 66 of a small vertically extendingdependlng cam block 67 set in the lower end of the cross head 48. It will be' manifest that when the crosshead 48 descends the rod 63 will be forced rearwardly thereb disconnecting the claw 34 of the latch 0g 35 from the latch block 33 allowing the trip plunger 28 to fly upwardly under the influence of the com ression spring 32. H retofore I have described the mechanism employed for heading the vertical rivet 18. I will now describe the pneumatic apparatus which co-operates with the punch block 53 in headin tending rivet 19. aid pneumatic apparatus is mounted upon a small stationary *bed late 69 secured to the upper face of an 1ntegral extension 70 projecting outwardly from the'end of the main frame 20. Said bed plate 69 is machined out as to its upper face in order to slidably accommodate the lower portion of the body 57 heretofore referred to (see Fig. 7). The said body 57 is normally forced towards the center of the apparatus by means of a pair of coil compression springs 71, each of said springs surrounding a small guide pin 72 screwed into'the outer face of the lower or slide portion 73 of the body 57. The outer end of said pin 72 extends loosely through holes drilled through a small cross bar or plate 74 secured to the outer end of the bed plate 69 by means of a pair of cap screws 75. If it is desired to decrease the power of said springs 71, the cap screws 75 may be slacked off somewhat thereby causing a space 76 between the cross plate 74 and the bed plate 69 (as shown in Fig. 6). The inward movement of the sliding body 57 is limited by an adjustable screw stop 77 carried-in the center of a cross piece 78 secured to the inner end of the bed plate 69 by cap screws 79. I

The outer body 57 in which the pneumatic mechanismris secured. as to its upper portion, is split as shown at 80 in order to constitute a clamp for the hammer body, said hammer body comprising a lower cylinder portion 81 and an upper longitudinally extending circular bead portion 82. said head portion 82 being clamped within the concave co-operating inner similarly curved parts of the clamp members 83 and 84 of the body portion 57. Said clamp parts 83 and 84 may be forced together by means of suitable bolts 85 which extend through the clamping lugs 86. The hammer body 81 constitutes a cylinder which is bored out internally to receive the horizontally exa ram 87 in which the operative or func- I tionalparts of the hammer mechanism are contained. In the present instance such mechanism is the same as used in the usual Boyer hammers. It will be observed that the rear end of the hammer body 81 is extended and is closed by the integral head, as shown at 88, said head 88v containing passages 89 and 90 for the. admission of operating fluid in this case air under pressure. .Said air is admitted to the conduit 90 through a vertical supply pipe 91 connected to a stationary supply pipe 93 controlled. by a suitable valve 94. In order to permit inner cylinder 97- formed insaid ram 87.

The outer end of said vibratory hammer 96 is arranged to strike against the inner end of a longitudinal punch rod 98, said punch rod being slidably contained within a longitudinal bore within the clamp rod 99. As shown best in Fig. 5,.the said clamp rod 99 is formed with an enlargement 100, the rear shoulder of which abuts against the reduced outer end 101 of the ram which projects from the end of the body part 57. In order to maintain the said shoulder in its said position in contact with the end of the ram 101, I prefer to employ a pair of op posed plate springs 102, the inner ends'103 of which are turned down to engage in the circular groove 104 in the end of the ram, the outer ends of said plate springs 102 being formed with rounded hook parts 105 engaging a reduced part of said enlargement 100. The said springs 102 are held in position by a pair of strap clamps 106 which partially embrace the reduced outer end 100 of the ram 87 and are secured together by means of a pair of clamping bolts or screws 107 (see Fig. 4). The clamping rib 82 of the hammer body57 is bored out as shown at 108 in Fig. 7 to receive a coil tension spring 109. one end of.

which is connected to a pin 110 (see also Fig. 4) the outer end being connected to the upper ends of said strap clamps 106. The effect of said spring 109 is to draw back the ram 87 into the cylinder of the body 57 whenever the pressure fluid is exhausted from the outer end of the said cylinder. When the pressure leaves the outer end of said cylinder, due to the shutting off of the valve 94, the backward movement of the ram 87 in the cylinder is limitcdby reason ,of the threaded collar 110 striking against a small guide 111 carried on the upper end of the small bracket 112 bolted to the bed plate (59 (see Fig. 1).

7 Referring back to Fig. 5, it will be seen that the outer end of the clamp rod 99 is bored out as shown at 113 in order to accommodate a coil compressionspring 1.14, the outer end of which engages against an enlargement .115 formed on the outer end of the punch rod 98. The outer end of said enlargement is arranged to abut against a similar enlargement 116 on the inner end of the rivet set 117 slidably mounted in an extension 118 on the end of the threaded collar 110; the spring .114. simply serves to maintain the two parts 115 and 116 in engagement when the vibratory hammer 96 is in operation. By reason of making the punch rod. 98 with a separate tip 117, 1 am enabled to repair or replace the rivet .set 117 without having to renew or remove the punch rod 98 as a whole.

The operation is as follows: After the parts 10 and 11 have been placed in their proper position, as shown in Fig. 4, the rivets 18 and 19 are inserted through the holes provided: the tip of the rivet l8 projecting upwardly above the part 14- and the tip of the rivet 19 projecting outwardly beyond part 16. The operator then depresses the pedal 37 to the fullest extent. As previously described the latter portion of said pedal movement is effective to trip the press, the shaft of which thereupon commences to rotate; meanwhile the movement of the )edal has been effective to bring the punch block 53 down into the position shown in Fig. 4 with the. rivet block 54- resting upon the upper end of the rivet 1-8, When at the end of the stroke of the press head, theblock 52 strikes the punch block 53, the end of the rivet 18 will obviously be squeezed or headed in the shape shown in Fig. 4. 1n this/connection it will be understood that the extent to which the end .of said rivet 18 is squeezed, is accurately determined by reason of the press head 50 completing its downward movement when it arrives at a. position corresponding with the dead center of the eccentric 45. It will be understood that the springs 71 are eii'ectivc to force the. body 57 inwardly until thepart 73 engages against the end of said set screw 77. After the pedal has been depressed to head the rivet 1b, the air, is turned on by the valve 94 and pressure fluid at once begins to till the outer end of the cylinder 81 whereupon the ram. is thrust inwardly into the position shown in l ig. t and in dotted linesin Fig. 5, with the end of the collar 118 held against the outer face of the angle iron part 16. At the same time backward movement of the hammer ram cylinder 81, to which the body 57 is clamped is effective to draw the block 54 tightly against the head of the rivet 16. .At the-same time the hammer piston 95 commences to vibrate and strike the inner end of the punch rod 98 thereby riveting or heading over the end of the rivet 19. It will be observed that during such heading operation of the rivet 19, the parts 16 and 17 and the head of the rivet 19 are forcibly clamped together between the part 118 and the rivet block 54 thereby absolutely eliminating the possibility of inferior work which would be present, if said parts were not securely clamped. After the riveting has been thus completed, the air is turned off at the valve 94, cylinder 81 becomes exhausted and the ram returns int-o its original position in its cylinder. The pedal is then raised and the punch block 53 permitted to rise whereupon the finished work may be removed from the apparatus.

The described details of construction 1 thereby but should be determined by reference to the appended claims.

1 claim:

1. 1n riveting apparatus for operating upon a pair of rivets in a single setting, said rivets being arranged with their axes at an angle to each other, the combination of a relatively stationary riveting abutment, av relativelymovable riveting abutment for operating upon a rivet interposed between said abutments, means for striking said lastnamcd abutment a hammer blow, a part of said last-named abutmentconstituting an abutment for the other rivet, a reciprocatory member for riveting said last-named rivet against said last-named abutment, and means for forcing said last-named abutment towards said last-named rivet.

2. ln riveting aparatus for operating upon a pair of rivets in a single setting, said rivets being disposed at right angles to each other, a bed constituting a stationary riveting abutment, an arm provided with a block movable into engagement with a rivet interposed between. said abutment and block, means for striking said block a hammer blow to head said rivet, means for forcing said block into engagement with 'the head of the other rivet. and a recip-rocatory member for heading the other end of said lastnamed rivet.

3. 1n :1 rivet press. the combination of a stationary riveting abutment, an arm provided with a punch having a complementary rivetin abutment, means for moving said arm. to )ring said punch into operative position, and means for striking said punch a hammer blow. V

4. In a rivet press, the combination of a stationary riveting. abutment, a swinging arm, a punch block on said arm and provided with a complementary riveting abutment. a nmiluuiiy operated member for moving said arm to bring said, abutmentsinto operative relation, and a rcciprocatory punch press slidably arranged to strike said block a single hammer blow.

5. In a rivet press, the combination of a stationary riveting abutment, a swinging arm, a punch block on said arm and provided with a complementary riveting abutment, a manually operated member for moving said arm to bring said abutments into operative relation, a reciprocatory punch press slidably arranged to strike said block a. single hammer blow, and means for man- "ually controlling the trip of said press and simultaneously controlling the movement of said am.

6. In a rivet press, the combination of a frame provided with a bed constituting a riveting abutment, a shaft mounted to rotate in said frame, a reciprocatory press 'nected to said head, constantly running power means, a block interposed between said head and said abutment and provided with a complementary riveting abutment, a

.swinging 'arm on which said block is mounted, means normally tending to move said block in a direction to separate said abutments to permit the insertion of the work, trip mechanism arranged to connectsaid shaft'to said power means whereby a reciprocatory movement of said head may be effected, and a manually operated member for controlling said trip mechanism and for swinging said arm to move said block to-- wards and into 0 erative position relative to said first name abutment.

7. In riveting apparatus for operating upon a pair of rivets in a single setting, said rivets being arranged with their axes at an angle to each other, the combination of a relatively stationary riveting abutment and a movably mounte riveting abutment complementary thereto for operating upon one of said rivets, means for striking said last named abutment a hammer blow, :1

art of said last named abutment constituting an abutment for the, other rivet and a reciprocatory member for riveting said other rivet against said last named abutment.

8. In ri-veting apparatus, the combination of a stationary abutment, a block having a pair of abutment faces one complementary to the first named abutment and the other abutment arranged to face at an angle thereto, a punch member for striking said 7 block to rivet one of said rivets, and a reciprocatory hammer member for heading :1.

rivet interposed between said hammer and the other abutment face on said block.

9. The combination of an ordinary punch press, a block'arranged to be s truck by the .head of said press to head a rivet having its axis parallel with the direction of movement of said head and a hammer member arranged to reciprocate at anangle to said line of movement and head a rivet lnterposed between said block and said hammer, the 'axis of said last-named rivet being parallel with the-line of movement of said hammer.

with the line of movement of said hammer, 5

and a manually controlled member for moving said block into riveting position and slmultaneou sl tripping said press.

11. In riveting apparatus, the combination head, an eccentrlc member on said shaft con-5* rivet P an abutment, Pdwer means for operating upon said punch to head a rivet interposed\ between said punch and said abutment, means normally operative to hold boththe punch and the abutmentout of'engagement with 'a rivet positioned between said punch and said. abutment and to be riveted, and power means for moving said punch and sald abutment in reverse directions-and towards said rivet to en ageop- I posite ends of the latter priorto t e riveting operation. 3

12. In riveting apparatus, the combinationof a relatively stationary riveting abutment, a cylinder'and a piston, oneof said last named two parts being connected to said abutment, and the other part being provided with means engaging and adapted to force towards said abutment a part in which the rivet is to be'se'cured, and pneumatic vibratory riveting mechanism including a .punch for heading said rivet, carried by the part-which is provided with the engaging means.

13. In riveting apparatus, the combina-' tion of a riveting abutment, a cylinder, a piston in said cylinder, means connecting said cylinder with said abutment, a tubular clamp member connected to said piston for forcing towards said abutment,'a part in which the rivet is to be secured, hammer mechanism carried by said piston and supplied with premure fluid from said cylinder, and a riveting punch operated by said hammer mechanism and slidably mounted vinsaid clamp member.

14. The combination of a cylinder having one end closed and the other open, a river.- ing abutment aligned ,with said cylinder and located opposite its open end, an arm tying together said cylinder and said abutment, a piston in said cylinder,-a pneumatic hammer contained in s'a1d piston, a punch rod slidebly'mounted in said piston, a tubularuclamp force towards said'abutment, a part in which the rivet is to be secure d, means for conductin I a supply of pressure fluid into said cy inder to move said piston and to operate said hammer mechanism and a valve for controlling said fluid.

l5. lln combination, a-bed for supporting a part in which two spaced rivets with parallel axes are to be inserted and riveted, and a riveting mechanism for operating upon each of said rivets? including an abutment and a punch, each of said punches being in-- dependently movable into engagement with the respective rivet to be headed thereby, one of said abutments being movable in a reverse direction to the movement of the punch associated. therewith prior to the actual riveting operation of said last-named punch.

16. in combination, a bed" for supporting a part in which two spaced rivets with parallel axes are to be inserted and riveted, a riveting mechanism for operating upon each of said rivets, including an abutment and a punch, each of said punches being independently movable into engagement with the respective rivet to be headedthereby, one of said abutments being movablein a reverse direction to the movement of the punch associated therewith prior to the actual riveting operation of said last-named punch, and power means for operating upon said punch to head the rivet and including means for forcing said last-named abutment towards the rivet during the heading operation.

17. In combination, a support on which a part in which a rivet is to be inserted may I be positioned, a riveting mechanism carried by said support for operating upon said rivet, comprising an abutment and a punch both movable relative to said support into engagement with the rivet prior to the heading operation, power meanstor eii'ecting said movement, and means controlled by power for withdrawing said abutment and i said punch away from the rivet when the heading operation is completed.

18. In riveting apparatus, the combination of a support, a body mounted to slide on said support, means normally operative to move said body in one direction, a riveting punch and an abutment carried by said body, one of said last-named two parts being rigidly connected to said body and the vother part being movably connected to the body, whereby both of said parts may be moved independently into engagement with the respective ends of a rivet prior to theheading operation.

19. In riveting apparatus, the combination of a support, a body mounted to slide on said supporn'means normally operative to move said body in one direction, a rivets ing punch'and an. abutment carried by said body, one of said last-named two parts being rigidly connected to said body and the other 'part being movably connected to the body, whereby both of said parts'maybe moved independently into engagement with the respective ends of a rivet prior to the heading operation, and a part opposite said abutment and slidably mounted on said punch, for forcing towards said abutment a part in which the rivet is inserted.

20. In combination, a member provided with a riveting abutment, a member provided with and carrying a vibratory hammer mechanism and having an extension movable towards said abutment to clampingly engage the part in which the rivet is inserted, a punch slidably carried in such extension and engaging the rivet to be headed, and a pair of members arranged to be forced apart by fluid pressure and connected respectively to the extension and to the of a cylinder, a piston therein, a riveting abutment connected to said cylinder, an extension on said piston, means for admitting pressure fluid to said cylinder to move said piston towards said abutment whereby sald extension is forced clampingly agalnst a part in which the rivet is inserted, a punch slidable in said extension and engaging the end of said rivet, punch-operating mechanism carried by said piston, and means normally tending to force apart the extension and the abutment.

23. In riveting apparatus, the combination of a cylinder, a piston therein, a riveting abutment connected to said cylinder, an extension on said piston, means for admitting pressure fluid to said cylinder to move said piston towards said abutment whereby said extension is forced clampingly against a part in which the rivet is 111- serted, a punch slidable in said extension and engaglng the end of said rivet, punch= operating mechanism carried by sa1d'piston, means normally tending to force apart the extension and the abutment, and means normally tending to move the abutment away from the rivet 24 In rinetingapparatus, the combination 7 of two members, power means for drawing I 7 members and including a punch slidably mounted in said last-named member, a riveting abutment carried by the other member, means normally tending to move said members apart, and resilient means normally 10 tending to shift the entire arrangement in the direction of .movement of said punch member under influence of the power means.

JOHN F. GAIL.

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